It’s a bad idea to dose the water with too much salt and medication at once as this can kill the fish. We therefore recommend quarantining the betta first, and if it hasn’t shown any signs of improvement after 7 days then stop the use of salt and use medication instead.
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If you do need to treat your betta for fin rot, it’s good practice to isolate the infected fish before treatment if it isn’t the only inhabitant of its aquarium. Create what’s known as a quarantine or so that the treatments or medicines don’t harm the other or . If any other tank mates have the infection, be sure to put them in quarantine along with the betta (or even better, create a separate quarantine aquarium for each of them).
then use tetracycline or ampicillin to treat the fish
Our fish are no different, except few of us have the luxury of taking our betta to a vet when they are under the weather. Instead we are forced to play doctor to them. To give them the best treatment possible, we must ask questions, make observations and determine what is causing our fish to be ill. I can spend all day talking about what to look for and how to diagnose a fish, but this article is about the importance of not overmedicating our fish. Let me say right off the bat, you do not need to medicate a healthy fish. That means, no antibiotics, no antiparasitics, no “herbal remedies” and no aquarium salt.
Instruction will be given on the packets of the medicines.
Severe cases of fin rot (fins just seemingly melting away and falling off in big pieces or when the rot is close to the body) should always be treated with an antibacterial fish medication like Sera Baktopur Direct or Tetracycline. Products like Melafix, Pimafix and Bettafix do not cure fin rot and may actually make it worse.Since Bettas are prone to this parasite, you need to always be on the lookout for it. If caught early it is very easy to cure. But, if it gets to advanced stages you may not be able to save the fish. Because Velvet is highly contagious and usually far advanced before being diagnosed, it is important to take steps to treat it as soon as possible. Treatment is targeted at the free-swimming stage of the parasite because the other stages are resistant to medication. It should also kill the parasites which have infested the outer layer of the skin and fins, but will fail to eradicate any parasites that have burrowed into the epithelial layer. The best time to attack velvet is when the parasite leaves the fish, so raising the temperature helps. That is why it is recommended to create conditions optimal for the parasites’ growth and multiplication and at the same time use the treatment aimed at dealing with them. If you prolong the course of treatment by prolonging the time when medication is administered, you risk poisoning the fish.